Atlas Roofing Corporation's family of polyiso roof insulation products is well established in the building materials industry. Polyiso is the most widely used and accepted rigid insulation in use today. It is estimated that 60-65% of all commercial new or re-roofing applications nationwide use polyiso. Rigid polyiso is a safe, cost-effective, sustainable and energy efficient construction material. Atlas ACFoam® Nailbase and ACFoam® CrossVent® polyiso roof insulation is QualityMarkcm Certified, providing consumers an easy way to identify premium products that meet or exceed listed LTTR-values. All Atlas Nailable insulation products are available as a special order product with FSC® Certified, Fire-Treated, Preservative-Treated and Radiant-Barrier OSB or CDX plywood.